The wake of falling disks at low Reynolds numbers
文献类型：期刊论文
| 作者 | Zhong HongJie2; Lee CunBiao1 |
| 刊名 | ACTA MECHANICA SINICA
 |
| 出版日期 | 2012 |
| 卷号 | 28期号:2页码:367-371 |
| 关键词 | SPHERE TRANSITION STEADY FLOW INSTABILITY DYNAMICS BODIES Flow visualization Transition Wake |
| ISSN号 | 0567-7718 |
| 其他题名 | The wake of falling disks at low Reynolds numbers |
| 英文摘要 | We visualized the wake structure of circular disks falling vertically in quiescent water. The evolution of the wake was shown to be similar to the flow patterns behind a fixed disk. The Reynolds number, Re = Ud/nu, is in the range of 40 - 200. With the ascension of Reynolds numbers, a regular bifurcation occurred at the first critical Reynolds number Re-c1, leading to a transition from an axisymmetric wake structure to a plane symmetric one; A Hopf bifurcation took place at the second critical Reynolds number Re-c2, as the wake structure became unsteady. Plane symmetry of the wake structure was first lost as periodic vortex shedding appeared, but recovered at higher Reynolds number. The difference between the two critical Reynolds numbers was found to be shape-dependent, as we compared our results for thin discs with those for other falling bodies, such as spheres and cones. This observation could be understood in terms of the instability mechanism of the vortical structure. |
| 资助项目 | [National Natural Science Fundation of China] ; [National Climb-B Plan] ; [National Foundation for Distinguished Young Scholar of China] ; [Science Fund for Creative Research Groups] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:4535459 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/157324]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.北京大学 2.中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Zhong HongJie,Lee CunBiao. The wake of falling disks at low Reynolds numbers[J]. ACTA MECHANICA SINICA,2012,28(2):367-371. |
| APA | Zhong HongJie,&Lee CunBiao.(2012).The wake of falling disks at low Reynolds numbers.ACTA MECHANICA SINICA,28(2),367-371. |
| MLA | Zhong HongJie,et al."The wake of falling disks at low Reynolds numbers".ACTA MECHANICA SINICA 28.2(2012):367-371. |
入库方式： OAI收割
来源：金属研究所
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